Department of Electrical and Electronics Engineering
Permanent URI for this collectionhttp://localhost:4000/handle/123456789/1925
Browse
6 results
Search Results
Item Design and Control of Wind integrated Shunt Active Power Filter to Improve Power Quality(IEEE, 2018) Bansal, Hari OmIn this paper wind energy conservation system (WECS) with shunt active power filter (SAPF) is proposed for harmonics elimination, power factor correction, reactive power compensation and grid current balancing. Adaptive neuro fuzzy inference system (ANFIS) based controller is implemented at WECS side to control the boost converter to achieve MPP and at SAPF sides to minimize voltage variations and enhance power quality. Here, synchronous reference frame (SRF) theory based reference current generation technique is employed in SAPF. The proposed scheme is implemented in MATLAB/Simulink. The results confirm that this method has better performance and can maintain total harmonic distortion (THD) level of the system within the IEEE standard 519.Item PSIM based Simulation and Hardware Implementation of 1-Phase and 3-phase Shunt Active Filter based on p-q Theory(IEEE, 2020-06) Bansal, Hari OmThe research presented deals with the control strategy for the power electronics converters in order to reduce the harmonic and to govern the injected active power into the grid. The compensation process is basically established on the p-q theory. This paper exhibits the investigation and execution of hardware implementation for a 1-phase and 3-phase shunt active power filter based on p-q theory (instantaneous reactive power theory). This theory have been widely used for 3-phases 3- wires and 3-phases 4-wire system but its use has not been carried out for 1-phase system. In this paper it has been modified so that it can also be implemented for the 1-phase system as well. To use this theory for 1-phase systems, two extra dummy signals were created with a phase difference of 120°. These three signals were fed to controller to decrease the THD in load current.Item Shunt active power filter: Current status of control techniques and its integration to renewable energy sources(Elsevier, 2018-10) Bansal, Hari OmThe renewable energy sources (RESs) are a viable alternative to fulfill the ever-rising energy demand. The present power distribution system contains nonlinear loads that bring up power quality issues like harmonics in source current, voltage sag and swell etc. This paper provides exhaustive review of control techniques of shunt active power filter (SAPF), maximum power point tracking (MPPT) and RES integrated with SAPF. Artificial neural network (ANN) based control system is designed to improve SAPF performance in terms of total harmonic distortion. The training data generated from conventional PI and perturb & observe (P&O) technique is used to train ANN based controller for SAPF and MPPT respectively. The photovoltaic (PV) integrated SAPF is simulated in MATLAB and then validated in real-time with microsecond time step on field-programmable gate array (FPGA) based computational engine of OPAL-RT 4510.Item Hardware in the loop implementation of wavelet based strategy in shunt active power filter to mitigate power quality issues(Elsevier, 2019-04) Bansal, Hari OmThis paper presents a Wavelet Transform (WT) based control algorithm for a shunt active power filter (SAPF), mainly to mitigate harmonic distortions in power distribution system modeling. Wavelet transforms are being used extensively for signal analysis and processing for fast and accurate identification of transients in power systems. In this work, SAPF has been modeled with a three-phase voltage source inverter using WT based schemes, resulting in minimizing of harmonic distortions and improvement in power factor for balanced, unbalanced & nonlinear loads. The system response for different types of WTs is compared and it is found that Haar WT provides minimum Total Harmonic Distortion (THD) and maximum power factor. OPAL-RT 4510 controller with microsecond step on its FPGA based computational engine is used for Hardware in the loop testing (HIL).Item Experimental Investigations on Particle Swarm Optimization Based Control Algorithm for Shunt Active Power Filter to Enhance Electric Power Quality(IEEE, 2022-05) Bansal, Hari OmQuality power is a very important factor for the proper functioning of appliances and can be enhanced using shunt active power filters (SAPF). This work demonstrates the hardware implementation of synchronous reference frame (SRF) theory based SAPF. This paper presents the technique of particle swarm optimization (PSO) to tune the gain values of the SAPF PI controller to control the voltage of the DC-link and enhance its dynamic efficiency. The estimation of gain values of PI controllers using conventional methods does not yield the expected outcomes under varying load conditions. The PSO tuned controller provides better results as compared to traditional tuning methods. The switching scheme is implemented using hysteresis controller to control the SAPF. The main objectives of this approach are to extract the compensating currents and cancel out the harmonics produced by balanced, unbalanced and nonlinear loads. The planned scheme is designed and implemented in MATLAB/Simulink and then its performance on a developed laboratory prototype is validated experimentally.Item Design and real-time validation of PI and Fuzzy Logic tuned photovoltaic integrated DSTATCOM to improve power quality(Springer, 2022-07) Bansal, Hari OmPower loss and malfunctioning of equipment due to current and voltage harmonics produced by nonlinear loads are major concerns for both power suppliers and consumers. This paper employs DSTATCOM to mitigate these harmonic distortions in distribution systems. DSTATCOM is a current controlled voltage source PWM converter with passive components. It supplies compensating current that eliminates current harmonics and provides reactive power compensation thereby providing a smooth source current. The performance of DSTATCOM is controlled using proportional integral and fuzzy logic–based control (FLC) schemes to improve power quality at dynamic loading. As the penetration of photovoltaic (PV) systems in energy production is significant, the power quality issues for PV-integrated systems have also been investigated. The maximum power point for a PV array is tracked using perturb and observe and FLC methods. The complete system is simulated in MATLAB and extensively investigated for a large range of balanced and unbalanced nonlinear load conditions. The simulation results are validated in real time through the hardware in loop (HIL) test bench using Opal-RT controller. The proposed PV-integrated DSTATCOM with FLC yields better performance in terms of DC link voltage settling time, total harmonics distortion, and smooth source current as compared to other schemes.